From owner-freebsd-questions Mon Nov 17 10:16:37 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id KAA00391 for questions-outgoing; Mon, 17 Nov 1997 10:16:37 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from wawasee.read.indiana.edu (wawasee.read.indiana.edu [149.159.108.2]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id KAA00370 for ; Mon, 17 Nov 1997 10:16:30 -0800 (PST) (envelope-from ghormann@nix.kconline.com) Received: from localhost (xwin@localhost) by wawasee.read.indiana.edu (8.8.5/8.8.5) with SMTP id NAA04538 for ; Mon, 17 Nov 1997 13:16:20 -0500 (EST) X-Authentication-Warning: wawasee.read.indiana.edu: xwin owned process doing -bs Date: Mon, 17 Nov 1997 13:16:20 -0500 (EST) From: Greg Hormann X-Sender: xwin@wawasee.read.indiana.edu Reply-To: Greg Hormann To: questions@freebsd.org Subject: Re: async fs? In-Reply-To: <199711171723.MAA28442@earth.mat.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > Are you aware that losing your system while you are running async is > usually fairly safe (often you lose no files, or if you were very busy > doing disk activity, maybe a few), but if you are mounted async, you > could possibly lose much, much more? It'll certainly increase > performance, but you'd better be willing to pay the price. What *exactly* does async do? Does async I/O just mean that Meta data is not immediately written to disk? I assume that FBSD buffers data, but writes Meta data to disk immediately like most Unix file systems. Greg.